Methods and Devices for Generating Trapezoidal Fire Pulses

A trapezoidal fire pulse generating device, comprising a second single-chip microcomputer control unit, a positive voltage output dual-channel DAC unit, a negative voltage output dual-channel DAC unit, a second analog switching unit and a second trapezoidal wave generating unit,

• wherein the second single-chip microcomputer control unit is configured to perform the following steps:
• determining voltage values of positive and negative DC control voltage signals according to pulse amplitude parameter values of the positive and negative trapezoidal fire pulses required to be output,
• determining a voltage value of fall-time DC control voltage signal according to a first fall time parameter value of the positive and negative trapezoidal fire pulses required to be output and the voltage value of the positive DC control voltage signal;
• or determining a voltage value of fall-time DC control voltage signal according to a second fall time parameter value of the positive and negative trapezoidal fire pulses required to be output and the voltage value of the negative DC control voltage signal,
• determining a voltage value of a rise-time DC control voltage signal according to a rise time parameter value of the positive and negative trapezoidal fire pulses required to be output and the voltage values of the positive and negative DC control voltage signals,
• generating a corresponding digital signal according to the determined voltage value of the positive DC control voltage signal and the determined voltage value of the fall-time DC control voltage signal, and inputting the digital signal to the positive voltage output dual-channel DAC unit,
• generating a corresponding digital signal according to the determined voltage value of the negative DC control voltage signal and the determined voltage value of the rise-time DC control voltage signal, and inputting the digital signal to the negative voltage output dual-channel DAC unit, and
• generating a first pulse width control signal and a second pulse width control signal which are both in a form of a square-wave or rectangular-wave pulse and inputting the same to the second analog switching unit,
• wherein the positive voltage output dual-channel DAC unit is configured to convert the received digital signal to a corresponding positive DC control voltage signal and a fall-time DC control voltage signal, input the positive DC control voltage signal to the second analog switching unit, and input the fall-time DC control voltage signal to the second trapezoidal wave generating unit,
• wherein the negative voltage output dual-channel DAC unit is configured to convert the received digital signal to a corresponding negative DC control voltage signal and a rise-time DC control voltage signal, input the positive DC control voltage signal to the second analog switching unit, and input the rise-time DC control voltage signal to the second trapezoidal wave generating unit,
• wherein the second analog switching unit is configured to modulate the positive and negative DC control voltage signals and a zero voltage signal to corresponding positive and negative square-wave pulses according to the input first and second pulse width control signals, and output the square-wave pulses to the second trapezoidal wave generating unit, and
• wherein the second trapezoidal wave generating unit is configured to generate and output positive and negative trapezoidal fire pulses according to the fall-time DC control voltage signal, the rise-time DC control voltage signal and the square-wave pulses.

A method for generating trapezoidal fire pulses, comprising:

• determining voltage values of positive and negative DC control voltage signals according to a pulse amplitude parameter value of the trapezoidal fire pulse required to be output, and determining a voltage value of a rise-time DC control voltage signal and a voltage value of a fall-time DC control voltage signal according to a rise time parameter value and a fall time parameter value of the trapezoidal fire pulse required to be output as well as the voltage values of positive and negative DC control voltage signals;
• generating corresponding DC control voltage signals according to the determined voltage values of positive and negative DC control voltage signals, the voltage value of the rise-time DC control voltage signal and the voltage value of the fall-time DC control voltage signal;
• modulating the positive and negative DC control voltage signals to corresponding square-wave pulses by using a pulse width control signal in a square-wave or rectangular-wave pulse form;
• and
• inputting the rise-time DC control voltage signal, the fall-time DC control voltage signal and the square-wave pulses to a reverse integrator with a feedback loop constituted by a dual differential amplifying circuit so as to generate a trapezoidal fire pulse and output the same.

A method for generating trapezoidal fire pulses, comprising:

• determining voltage values of positive and negative DC control voltage signals according to pulse amplitude parameter values of positive and negative trapezoidal fire pulses required to be output;
• determining a voltage value of fall-time DC control voltage signal according to a first fall time parameter value of the positive and negative trapezoidal fire pulses required to be output and the voltage value of the positive DC control voltage signal;
• or determining a voltage value of fall-time DC control voltage signal according to a second fall time parameter value of the positive and negative trapezoidal fire pulses required to be output and the voltage value of the negative DC control voltage signal;
• determining a voltage value of a rise-time DC control voltage signal according to a rise time parameter value of the positive and negative trapezoidal fire pulses required to be output and the voltage values of the positive and negative DC control voltage signals;
• generating a corresponding DC control voltage signal according to the determined voltage values of the negative and positive DC control voltage signals as well as the voltage values of the rise-time and fall-time DC control voltage signals,
• modulating the positive and negative DC control voltage signals and the zero voltage signal to positive and negative square-wave pulses by using a first pulse width control signal and a second pulse width control signal which are both in a form of a square-wave or rectangular-wave pulse, wherein a falling edge of the first pulse width control signal coincides with a rising edge of the second pulse width control signal;
• inputting the rise-time DC control voltage signal, the fall-time DC control voltage signal, and the positive and negative square-wave pulses to a reverse integrator with a feedback loop constituted by a dual differential amplifying circuit so as to generate positive and negative trapezoidal fire pulses and outputting the same.